Pin and guide for molding flasks



Dec; 14 1926.-

G. L. DEYETTE ET AL 7 PIN AND GUIDE FOR MOLDING FLASKS Filed Dec. 17, 1925 /E El George- [buzs Deyelie Deon iZZzzzk.

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GEORGE LOUIS DEYETTE AND LEON IVZR'UZK, O CHICAGO, ILLINOIS.

IPIN AND GUIDE FOR BEGLDING FLASKEl.

Application filed December 17, 19535.

This invention relates to ampin and guide for molding flasks such as are used in foundries for containing the sand and patterns.

It is one of the objects of this invention to provide a pin and guide that possess certain adjustable features, whereby poorly matched copes and drags may be used together.

It is a further object to provide a pin carrying plate and a removable pin adjustable therein, and a guide plate having adjustable guide members to compensate for misalignment of flask parts.

Other and further objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

The invention in a preferred. form is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a perspective View of a flask employing a pin and guide embodying the principles of our invention.

Figure 2 is an enlarged side elevational view of the pin and guide.

Figure 3 is a top plan view.

Figure 1 is a sectional view taken on line IVIV of Figure 2, showing parts in elevation.

Figure 5 is a sectional view taken on line VV of Figure 2 showing parts in elevation.

Figure 6 is a sectional view taken on line VIVT of Figure 2, showing parts in elevation.

As shown on the drawings:

The reference numeral 1 indicates a molding flask such as is commonly used in foundries for holding the sand and patterns. The upper part of the flash is known as the cope, and the lower part the drag, these parts being represented by the numerals2 and 3 re spectively. A pin 1 and guide 5 of our improved construction are provided for aligning and reinovably holding together these parts, ordinarily the pin being secured to the drag and the guide to the cope.

The pin 1 is not directly secured to the drag but is adjustably mounted on a plate 6. Said plate 6 (Figure 6) comprises a base portion '1 provided with holes 8 for receiving bolts or other attaching means and pointed spurs 9 for preventing the plate from becom-- ing displaced. Flanges 10 extend from one edge to serve as a handle, and a wedgeshaped groove 11 formed in a central in- Serial 'No. 75,892.

tegral boss 11 extends centrally of said plate and between said flanges 10. Said groove 11 is inclined at an angle to the base 7 as best shown in Figure 5 for a purpose that will later appear. The bottom of said groove is cut slightly deeper as at 12 to provide ample clearance.

The pin 1 which is substantially hexagonal in cross section for the greater part of its length is provided at one end with a pentagonal shaped head 13, having a fiat upper. face and a V-shaped bottom 1 1 adapted to fit in the groove 11. The V-shaped bottom 14 is also tapered but in a reverse direction to the inclination of the groove, so that the top face of the pin and the base? will always be parallel, regardless of the position of the pin in the groove 11. An adjusting bolt 15 extends through an elongated slot 16 (Fig. 5) in said head'13 and is adapted to be threaded in the base 7. It is obvious that by screwing the bolt 15 into the base 7, a washer 17 with which the bolt 15 is provided may be caused to bear against the upper face of the head 13 and frictionally retain said head in place in the groove 11. A. look nut 18 prevents the bolt 15 from working loose.

The guide 5 comprises a guide plate 19 adapted to be secured to the cope 2 by bolts passing through holes 31 and to be held against displacement by the points 32. Flanges 20 extend along one edge of said guide plate 19 and a pair of coacting guide members 21 are centrally mounted thereon between said flanges. Said guide members 21 rest upon cross strips 22 to which they are adjustably secured by means of bolts 2? passing through enlarged holes 24 therein. The guide members 21 are thereby rendered relatively adjustable for snugly receiving the pin 41. For this purpose the inner faces of the guide members 21 are substantially V-shaped as at 25 and accurately machined to fit the machined ii-shaped sides of the pin 1. In order to eliminate the possibility of the pin 1 binding on its lower face, which may be left rough, the strips 22 are cut away, as at 30. It will be noted that the end of the pin 4 is beveled as at 26 on all sides so as to facilitate the insertion of said pin between said guide members 21.

One of the main advantages of our pin and guide lies in the fact that they may be adjusted to compensate for any slight mis alignment between the cope and drag. it

is apparent that by loosening the bolt 15 the pin 4; may be moved in the groove 11 so as to bring the pin 4 either farther away from the side of the drag or nearer to the side of the drag. In this Way small differences in the thickness of the boards making up the drag or cope may be compensated for. Similarly, the guides 21 may be moved by loosening the bolt 23 and the entire guideway may be shifted laterally so that it will properly align with the pin 4:. The guideways 21 may be moved closer together to more tightly clamp the pin at. Since the guide-ways 21 together inclose four sides of the pin 4 it is obvious that the pin 4 will be prevented from movement in any but an axial direction.

\Vhile we have shown our pin and guide as applied to a straight flask, it will also be understood that our device could also be used on a tapered flask, a snap flask or any other different type of flask. The shape of the pin which we have provided also adapts the same for use with matched plate guides now in use by many foundries.

We are aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and we therefore do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

lVe claim as our invention:

1. A device of the class described comprising a plate having an inclined V-shaped groove, a hexagonal shaped pin having a head adapted to fit in said groove, a second plate and a guide adj ustably secured thereon and adapted to receive said pin.

2. In a molding flask comprising separate nrembers, an adjustable guide secured to one of said members and a pin adjustably secured to the other thereof and adapted to be received by said guide.

3. In a. molding flask, separable containers, plates adapted. to be secured to the sides of said containers, one of said plates having an inclined groove, a pin longitudinally adjustable in said groove, and a pair of relatively adjustable guides on the other plate for receiving said pin.

t. A device of the class described comprising a pair of plates having positioning means thereon, one of said plates having an inclined groove, a pin adjustably secured in said groove and a guide on the other plate adapted to receive said pin and hold said pin against lateral movement.

5. In a molding flask, separable containers, a guide plate secured to one of said containers, V-shaped 'uide members adjustably mounted on said plates, a pin carrying plate secured to the other container and having an inclined groove therein and a pin mounted in said groove for axial adjustment and havin vi-shaped lateral edges adapted to be frictionally engaged by said V-guides.

In testimony whereof we have hereunto subscribed our names.

GEORGE LOUIS DEYETTE. LEON MRUK. 

